LiveActive security incident?Get immediate response
CVE Record

CVE-2021-35604: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.35 and prior and 8.0.26 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server as well as unauthorized update, insert or delete access to some of MySQL Server accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).

MediumCVSS 5.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-35604 is a MySQL Server InnoDB vulnerability. A highly privileged network attacker could disrupt the database or alter some accessible data. The business risk is strongest where older MySQL servers support critical applications and privileged database access is broadly reachable.

Executive priority

Treat as a planned remediation item unless affected MySQL servers support critical services or expose privileged access broadly. Prioritize patching critical databases and reducing privileged network reachability.

Technical view

Oracle lists affected MySQL Server versions as 5.7.35 and prior, and 8.0.26 and prior. CVSS 3.1 is 5.5: network attack vector, low complexity, high privileges required, no user interaction, integrity low, availability high, confidentiality none.

Likely exposure

Exposure is likely limited to organizations running affected Oracle MySQL Server versions or downstream vendor packages referenced by Oracle, NetApp, or Fedora advisories. Systems with tightly restricted privileged database access have lower practical exposure.

Exploitation context

The bundle does not cite active exploitation, and KEV status is false. The attacker must already hold high privileges and have network access through supported MySQL protocols. Impact is denial of service and limited unauthorized data modification.

Researcher notes

Public details in the bundle are sparse: no CWE, no flaw mechanics, and no exploit proof. Analysis should stay anchored to Oracle's InnoDB component attribution, affected versions, and CVSS vector.

Mitigation direction

  • Inventory MySQL Server versions across production and non-production environments.
  • Review Oracle October 2021 CPU guidance for applicable MySQL updates.
  • Apply Oracle or downstream vendor security updates where applicable.
  • Restrict network paths to MySQL from non-administrative systems.
  • Review and reduce high-privilege MySQL accounts.

Validation and detection

  • Confirm no MySQL instance is version 5.7.35 or earlier.
  • Confirm no MySQL instance is version 8.0.26 or earlier.
  • Check Fedora, NetApp, or other vendor package status where used.
  • Review MySQL logs for repeated crashes or hangs.
  • Audit privileged account access paths to database services.
Prepared
Confidence
high
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-35604 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
8Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H1.24.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2021-35604Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationMySQL Server5.7.35 and prior, 8.0.26 and priorListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.